| sample |
A portion of a population, or a subset from a set of units, that is selected by some probability mechanism for the purpose of investigating the properties of the population. NAEP does not assess an entire population but rather selects a representative sample from the group to answer assessment items.
출처: nces.ed.gov/nationsreportcard/glossary.asp
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|---|---|
| sample |
A statistically-significant subset selected and analyzed to estimate the characteristics of a larger group or population; a set of individuals within an organization assessed to provide information on the preferences, opinions, attitudes, and practices of the group they represent.
출처: www.georgetown.edu/uis/ia/dw/GLOSSARY0816.html
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| sample |
Small quantities of lunar soil or rocks that are sufficiently small to return them to Earth. On each mission several different kinds of samples are collected. Contingency sample consists of 1 to 2 pounds of rocks and soil collected very early in the surface operations so that at least some material will have been returned to Earth in the event that the surface activities are halted abruptly and the mission aborted. ...
출처: history.nasa.gov/EP-95/glossary.htm
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| sample mean |
The mean or average of the sample values. It is conventionally represented by x-bar, but in these pages by m.
출처: www.umass.edu/wsp/statistics/glossary/sz.html
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| sample standard deviation |
The standard deviation of the sample, rather than that of the population. Its formula is importantly different from that of the population standard deviation; see below under Standard Deviation.
출처: www.umass.edu/wsp/statistics/glossary/sz.html
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